v0.0.10

fix #1 fix #2 fix #3
fixed and enhanced merge

build.gradle.kts

@@ -1,10 +1,10 @@
 plugins {
-    kotlin("multiplatform") version "1.7.21"
+    kotlin("multiplatform") version "1.9.22"
     `maven-publish`
 }
 
 group = "net.sergeych"
-version = "0.0.8-SNAPSHOT"
+version = "0.0.10"
 
 repositories {
     mavenCentral()
@@ -14,7 +14,7 @@ repositories {
 
 kotlin {
     jvm {
-        jvmToolchain(8)
+        jvmToolchain(11)
         withJava()
         testRuns["test"].executionTask.configure {
             useJUnitPlatform()
@@ -29,25 +29,63 @@ kotlin {
             }
         }
     }
-    val hostOs = System.getProperty("os.name")
+//    val hostOs = System.getProperty("os.name")
-    val isMingwX64 = hostOs.startsWith("Windows")
+//    val isMingwX64 = hostOs.startsWith("Windows")
-    val nativeTarget = when {
+//    val nativeTarget = when {
-        hostOs == "Mac OS X" -> macosX64("native")
+//        hostOs == "Mac OS X" -> macosX64("native")
-        hostOs == "Linux" -> linuxX64("native")
+//        hostOs == "Linux" -> linuxX64("native")
-        isMingwX64 -> mingwX64("native")
+//        isMingwX64 -> mingwX64("native")
-        else -> throw GradleException("Host OS is not supported in Kotlin/Native.")
+//        else -> throw GradleException("Host OS is not supported in Kotlin/Native.")
+//    }
+
+    wasmJs {
+        browser()
+        binaries.executable()
+    }
+
+    listOf(
+        iosX64(),
+        iosArm64(),
+        iosSimulatorArm64()
+    ).forEach {
+        it.binaries.framework {
+            baseName = "morozilko_lib"
+            isStatic = true
+        }
+    }
+
+    listOf(
+        macosX64(),
+        macosArm64()
+    ).forEach {
+        it.binaries.framework {
+            baseName = "morozilko_lib"
+            isStatic = true
+        }
+    }
+
+    linuxX64 {
+        binaries.staticLib {
+            baseName = "morozilko_lib"
+        }
+    }
+
+
+    mingwX64 {
+        binaries.staticLib {
+            baseName = "morozilko_lib"
+        }
     }
 
     
     sourceSets {
         val commonMain by getting {
             dependencies {
-//                implementation("dev.gitlive:kotlin-diff-utils:4.1.4")
+//                implementation("net.sergeych:mp_stools:[1.4.7,)")
             }
         }
         val commonTest by getting {
             dependencies {
-                implementation("net.sergeych:mp_stools:[1.3.4,)")
                 implementation(kotlin("test"))
             }
         }
@@ -55,8 +93,8 @@ kotlin {
         val jvmTest by getting
         val jsMain by getting
         val jsTest by getting
-        val nativeMain by getting
+//        val nativeMain by getting
-        val nativeTest by getting
+//        val nativeTest by getting
     }
 
     publishing {

src/commonMain/kotlin/dev/gitlive/difflib/algorithm/myers/MeyersDiff.kt

@@ -44,7 +44,7 @@ class MeyersDiff<T> : DiffAlgorithmI<T> {
     override fun computeDiff(source: List<T>, target: List<T>, progress: DiffAlgorithmListener?): List<Change> {
         progress?.diffStart()
         val path = buildPath(source, target, progress)
-        val result = buildRevision(path, source, target)
+        val result = buildRevision(path)
         progress?.diffEnd()
         return result
     }
@@ -116,7 +116,7 @@ class MeyersDiff<T> : DiffAlgorithmI<T> {
      * @throws DifferentiationFailedException if a [Patch] could not be
      * built from the given path.
      */
-    private fun buildRevision(actualPath: PathNode, orig: List<T>, rev: List<T>): List<Change> {
+    private fun buildRevision(actualPath: PathNode): List<Change> {
         var path: PathNode? = actualPath
         val changes: MutableList<Change> = ArrayList()
         if (path!!.isSnake) {

src/commonMain/kotlin/dev/gitlive/difflib/patch/AbstractDelta.kt

@@ -62,7 +62,7 @@ abstract class AbstractDelta<T>(val type: DeltaType, val source: Chunk<T>, val t
         if (this::class != other::class) {
             return false
         }
-        val other = other as AbstractDelta<*>
+        other as AbstractDelta<*>
         if (source != other.source) {
             return false
         }
@@ -70,4 +70,14 @@ abstract class AbstractDelta<T>(val type: DeltaType, val source: Chunk<T>, val t
             false
         } else type == other.type
     }
+
+    /**
+     * If this delta is partially performed by [existing], update it si it only changes necessary
+     * data. If this delta copies completely an existing delta, return null.
+     *
+     * Base class implementation only removes complete dupes
+     */
+    open fun optimizeAgainst(existing: AbstractDelta<T>): AbstractDelta<T>? {
+        return if( this == existing ) null else this
+    }
 }

src/commonMain/kotlin/dev/gitlive/difflib/patch/Chunk.kt

@@ -15,6 +15,8 @@
  */
 package dev.gitlive.difflib.patch
 
+import net.sergeych.merge3.overlaps
+
 /**
  * Holds the information about the part of text involved in the diff process
  *
@@ -28,7 +30,7 @@ package dev.gitlive.difflib.patch
  *
  *
  * @author [](dm.naumenko@gmail.com>Dmitry Naumenko</a>
-@param <T> The type of the compared elements in the 'lines'.
+ * @param <T> The type of the compared elements in the 'lines'.
 ) */
 class Chunk<T> {
 
@@ -130,8 +132,8 @@ class Chunk<T> {
         if (this::class != other::class) {
             return false
         }
-        val other = other as Chunk<*>?
+        other as Chunk<*>
-        if (lines != other!!.lines) {
+        if (lines != other.lines) {
             return false
         }
         return position == other.position
@@ -140,4 +142,11 @@ class Chunk<T> {
     override fun toString(): String {
         return "[position: " + position + ", size: " + size() + ", lines: " + lines + "]"
     }
+
+    /**
+     * Range that this chunk covers (start incusive, end non inclusive)
+     */
+    fun range() = position..< position+size()
+
+    fun overlaps(target: Chunk<T>): Boolean = range() overlaps target.range()
 }

src/commonMain/kotlin/dev/gitlive/difflib/patch/InsertDelta.kt

@@ -29,7 +29,7 @@ class InsertDelta<T>
  * @param revised The original chunk. Must not be `null`.
  */
     (original: Chunk<T>, revised: Chunk<T>) : AbstractDelta<T>(DeltaType.INSERT, original, revised) {
-//    @Throws(PatchFailedException::class)
+    //    @Throws(PatchFailedException::class)
     protected override fun applyTo(target: MutableList<T>) {
         val position = source.position
         val lines: List<T> = this.target.lines
@@ -54,4 +54,35 @@ class InsertDelta<T>
     override fun withChunks(original: Chunk<T>, revised: Chunk<T>): AbstractDelta<T> {
         return InsertDelta(original, revised)
     }
+
+    /**
+     * Eliminates inserting the same text in the same positions
+     */
+    override fun optimizeAgainst(existing: AbstractDelta<T>): AbstractDelta<T>? {
+        return super.optimizeAgainst(existing)?.let { x ->
+            if (existing !is InsertDelta)
+                x
+            else {
+                // this algorithm only eliminates deltas that have the common prefix:
+                if (existing.target.position != target.position)
+                    return this
+                // remove common prefix:
+                var offset = 0
+                while (existing.target.lines[offset] == target.lines[offset]) {
+                    offset++
+                    if (offset >= target.lines.size || offset >= existing.target.lines.size) break
+                }
+                if (offset >= target.lines.size) {
+                    // removed completely
+                    return null
+                }
+                // removed a part:
+                val tail = target.lines.drop(offset)
+                return InsertDelta(
+                    Chunk(source.position, source.lines.drop(offset), source.changePosition?.let { it + offset }),
+                    Chunk(target.position + offset, tail, target.changePosition?.let { it + offset })
+                )
+            }
+        }
+    }
 }

src/commonMain/kotlin/dev/gitlive/difflib/text/DiffRow.kt

@@ -56,7 +56,7 @@ class DiffRow(
         if (this::class != other::class) {
             return false
         }
-        val other = other as DiffRow
+        other as DiffRow
         if (newLine != other.newLine) {
             return false
         }

src/commonMain/kotlin/dev/gitlive/difflib/unifieddiff/UnifiedDiffReader.kt

@@ -12,84 +12,71 @@ import dev.gitlive.difflib.patch.Chunk
 class UnifiedDiffReader internal constructor(lineReader: LineReader) {
     private val nextLine: LineReader
     private val data = UnifiedDiff()
-    private val DIFF_COMMAND: UnifiedDiffLine = UnifiedDiffLine(true, "^diff\\s") { match: MatchResult, line: String ->
+    private val DIFF_COMMAND: UnifiedDiffLine = UnifiedDiffLine(true, "^diff\\s") { _, line: String ->
         processDiff(
-            match,
             line
         )
     }
-    private val SIMILARITY_INDEX: UnifiedDiffLine = UnifiedDiffLine(true, "^similarity index (\\d+)%$") { match: MatchResult, line: String ->
+    private val SIMILARITY_INDEX: UnifiedDiffLine = UnifiedDiffLine(true, "^similarity index (\\d+)%$") { match: MatchResult, _ ->
         processSimilarityIndex(
-            match,
+            match
-            line
         )
     }
-    private val INDEX: UnifiedDiffLine = UnifiedDiffLine(true, "^index\\s[\\da-zA-Z]+\\.\\.[\\da-zA-Z]+(\\s(\\d+))?$") { match: MatchResult, line: String ->
+    private val INDEX: UnifiedDiffLine = UnifiedDiffLine(true, "^index\\s[\\da-zA-Z]+\\.\\.[\\da-zA-Z]+(\\s(\\d+))?$") { _: MatchResult, line: String ->
         processIndex(
-            match,
             line
         )
     }
-    private val FROM_FILE: UnifiedDiffLine = UnifiedDiffLine(true, "^---\\s") { match: MatchResult, line: String ->
+    private val FROM_FILE: UnifiedDiffLine = UnifiedDiffLine(true, "^---\\s") { _, line: String ->
         processFromFile(
-            match,
             line
         )
     }
-    private val TO_FILE: UnifiedDiffLine = UnifiedDiffLine(true, "^\\+\\+\\+\\s") { match: MatchResult, line: String ->
+    private val TO_FILE: UnifiedDiffLine = UnifiedDiffLine(true, "^\\+\\+\\+\\s") { _, line: String ->
         processToFile(
-            match,
             line
         )
     }
-    private val RENAME_FROM: UnifiedDiffLine = UnifiedDiffLine(true, "^rename\\sfrom\\s(.+)$") { match: MatchResult, line: String ->
+    private val RENAME_FROM: UnifiedDiffLine = UnifiedDiffLine(true, "^rename\\sfrom\\s(.+)$") { match: MatchResult, _: String ->
         processRenameFrom(
-            match,
+            match
-            line
         )
     }
-    private val RENAME_TO: UnifiedDiffLine = UnifiedDiffLine(true, "^rename\\sto\\s(.+)$") { match: MatchResult, line: String ->
+    private val RENAME_TO: UnifiedDiffLine = UnifiedDiffLine(true, "^rename\\sto\\s(.+)$") { match: MatchResult, _: String ->
         processRenameTo(
-            match,
+            match
-            line
         )
     }
-    private val NEW_FILE_MODE: UnifiedDiffLine = UnifiedDiffLine(true, "^new\\sfile\\smode\\s(\\d+)") { match: MatchResult, line: String ->
+    private val NEW_FILE_MODE: UnifiedDiffLine = UnifiedDiffLine(true, "^new\\sfile\\smode\\s(\\d+)") { match: MatchResult, _: String ->
         processNewFileMode(
-            match,
+            match
-            line
         )
     }
-    private val DELETED_FILE_MODE: UnifiedDiffLine = UnifiedDiffLine(true, "^deleted\\sfile\\smode\\s(\\d+)") { match: MatchResult, line: String ->
+    private val DELETED_FILE_MODE: UnifiedDiffLine = UnifiedDiffLine(true, "^deleted\\sfile\\smode\\s(\\d+)") { match: MatchResult, _: String ->
         processDeletedFileMode(
-            match,
+            match
-            line
         )
     }
-    private val BINARY_FILE_CHANGED: UnifiedDiffLine = UnifiedDiffLine(true, "Binary files (.*) and (.*) differ") { match: MatchResult, line: String ->
+    private val BINARY_FILE_CHANGED: UnifiedDiffLine = UnifiedDiffLine(true, "Binary files (.*) and (.*) differ") { _, _ ->
-        processBinaryFileChange(match, line)
+        processBinaryFileChange()
     }
-    private val CHUNK: UnifiedDiffLine = UnifiedDiffLine(false, UNIFIED_DIFF_CHUNK_REGEXP) { match: MatchResult, chunkStart: String ->
+    private val CHUNK: UnifiedDiffLine = UnifiedDiffLine(false, UNIFIED_DIFF_CHUNK_REGEXP) { match: MatchResult, _: String ->
         processChunk(
-            match,
+            match
-            chunkStart
         )
     }
-    private val LINE_NORMAL = UnifiedDiffLine("^\\s") { match: MatchResult, line: String ->
+    private val LINE_NORMAL = UnifiedDiffLine("^\\s") { _: MatchResult, line: String ->
         processNormalLine(
-            match,
             line
         )
     }
-    private val LINE_DEL = UnifiedDiffLine("^-") { match: MatchResult, line: String ->
+    private val LINE_DEL = UnifiedDiffLine("^-") { _: MatchResult, line: String ->
         processDelLine(
-            match,
             line
         )
     }
-    private val LINE_ADD = UnifiedDiffLine("^\\+") { match: MatchResult, line: String ->
+    private val LINE_ADD = UnifiedDiffLine("^\\+") { _: MatchResult, line: String ->
         processAddLine(
-            match,
             line
         )
     }
@@ -238,14 +225,14 @@ class UnifiedDiffReader internal constructor(lineReader: LineReader) {
         }
     }
 
-    private fun processDiff(match: MatchResult, line: String) {
+    private fun processDiff(line: String) {
         val fromTo = parseFileNames(line)
         actualFile!!.fromFile = fromTo[0]
         actualFile!!.toFile = fromTo[1]
         actualFile!!.diffCommand = line
     }
 
-    private fun processSimilarityIndex(match: MatchResult, line: String) {
+    private fun processSimilarityIndex(match: MatchResult) {
         actualFile!!.similarityIndex = match.groupValues[1].toInt()
     }
 
@@ -285,7 +272,7 @@ class UnifiedDiffReader internal constructor(lineReader: LineReader) {
         }
     }
 
-    private fun processNormalLine(match: MatchResult, line: String) {
+    private fun processNormalLine(line: String) {
         val cline = line.substring(1)
         originalTxt.add(cline)
         revisedTxt.add(cline)
@@ -293,7 +280,7 @@ class UnifiedDiffReader internal constructor(lineReader: LineReader) {
         addLineIdx++
     }
 
-    private fun processAddLine(match: MatchResult, line: String) {
+    private fun processAddLine(line: String) {
         val cline = line.substring(1)
         revisedTxt.add(cline)
         addLineIdx++
@@ -301,7 +288,7 @@ class UnifiedDiffReader internal constructor(lineReader: LineReader) {
         addLineIdxList.add(new_ln - 1 + addLineIdx)
     }
 
-    private fun processDelLine(match: MatchResult, line: String) {
+    private fun processDelLine(line: String) {
         val cline = line.substring(1)
         originalTxt.add(cline)
         delLineIdx++
@@ -309,7 +296,7 @@ class UnifiedDiffReader internal constructor(lineReader: LineReader) {
         delLineIdxList.add(old_ln - 1 + delLineIdx)
     }
 
-    private fun processChunk(match: MatchResult, chunkStart: String) {
+    private fun processChunk(match: MatchResult) {
         // finalizeChunk();
         old_ln = toInteger(match, 1, 1)
         old_size = toInteger(match, 2, 1)
@@ -323,37 +310,37 @@ class UnifiedDiffReader internal constructor(lineReader: LineReader) {
         }
     }
 
-    private fun processIndex(match: MatchResult, line: String) {
+    private fun processIndex(line: String) {
         actualFile!!.index = line.substring(6)
     }
 
-    private fun processFromFile(match: MatchResult, line: String) {
+    private fun processFromFile(line: String) {
         actualFile!!.fromFile = extractFileName(line)
         actualFile!!.fromTimestamp = extractTimestamp(line)
     }
 
-    private fun processToFile(match: MatchResult, line: String) {
+    private fun processToFile(line: String) {
         actualFile!!.toFile = extractFileName(line)
         actualFile!!.toTimestamp = extractTimestamp(line)
     }
 
-    private fun processRenameFrom(match: MatchResult, line: String) {
+    private fun processRenameFrom(match: MatchResult) {
         actualFile!!.renameFrom = match.groupValues[1]
     }
 
-    private fun processRenameTo(match: MatchResult, line: String) {
+    private fun processRenameTo(match: MatchResult) {
         actualFile!!.renameTo = match.groupValues[1]
     }
 
-    private fun processNewFileMode(match: MatchResult, line: String) { 
+    private fun processNewFileMode(match: MatchResult) {
         actualFile!!.newFileMode = match.groupValues[1]
     }
 
-    private fun processDeletedFileMode(match: MatchResult, line: String) {
+    private fun processDeletedFileMode(match: MatchResult) {
         actualFile!!.deletedFileMode = match.groupValues[1]
     }
 
-    private fun processBinaryFileChange(match: MatchResult, line: String) {
+    private fun processBinaryFileChange() {
         // Nothing happens yet
     }
 

src/commonMain/kotlin/net.sergeych.merge3/merge3.kt

@@ -105,7 +105,6 @@ private class Merge3<T>(
     }
 
 //    private fun trace() {
-//
 //        debug { result.indices.joinToString("") { "%3d".sprintf(it) } }
 //        debug { result.joinToString("") { "%3s".sprintf(it.toString()) } }
 //        debug {
@@ -205,22 +204,25 @@ private class Merge3<T>(
 
     fun perform(): MergeResult<T> {
         val dA = diff(source, variantA).getDeltas()
-        val dB = diff(source, variantB).getDeltas()
+        val dB = removeDupes(diff(source, variantB).getDeltas(), dA)
+
+
 
         debug { "dA: $dA" }
         debug { "dB: $dB" }
 
 //        trace()
 
-        debug { "adding first set" }
+        // optimized nust be applied first
-        for (d in dA) {
-            debug { "adding dA $d" }
-            applyDelta(d)
-        }
         for (d in dB) {
             debug { "adding dB $d" }
             applyDelta(d)
         }
+        // then apply full
+        for (d in dA) {
+            debug { "adding dA $d" }
+            applyDelta(d)
+        }
 
         // detect ranges
         var conflictStart = -1
@@ -272,6 +274,25 @@ private class Merge3<T>(
 
         return MergeResult<T>(result, updates, reindex)
     }
+
+    /**
+     * Remove deltas from [deltas] that are already included into [existing]. It might require
+     * modifying existing deltas or removing it completely
+     */
+    private fun removeDupes(
+        deltas: List<AbstractDelta<T>>,
+        existing: List<AbstractDelta<T>>,
+    ): List<AbstractDelta<T>> {
+        // partial solutions: complete removal
+        return deltas.filter { it !in existing }.mapNotNull { s0 ->
+            var s: AbstractDelta<T>? = s0
+            for (x in existing) {
+                s = s?.optimizeAgainst(x)
+                if( s == null ) break
+            }
+            s
+        }
+    }
 }
 
 /**

src/commonMain/kotlin/net.sergeych.merge3/range_tools.kt

@@ -0,0 +1,18 @@
+package net.sergeych.merge3
+
+/**
+ * Check that other is inside this (inclusive)
+ */
+operator fun <T: Comparable<T>>ClosedRange<T>.contains(other: ClosedRange<T>): Boolean =
+    other.start >= start && other.endInclusive <= endInclusive
+
+
+/**
+ * Check that [other] overlaps (e.g., other has non-empty intersection with this), this also
+ * includes the case when other is inside this or this is inside other completely. Use [contains] to exclude
+ * the containing.
+ */
+
+infix fun <T: Comparable<T>>ClosedRange<T>.overlaps(other: ClosedRange<T>): Boolean {
+    return start in other || endInclusive in other
+}

src/commonTest/kotlin/testMerge.kt

@@ -1,23 +1,23 @@
 import net.sergeych.merge3.MergeResult
 import net.sergeych.merge3.MergedBlock
 import net.sergeych.merge3.merge3
-import net.sergeych.mp_logger.Log
+//import net.sergeych.mp_logger.Log
-import net.sergeych.sprintf.sprintf
+//import net.sergeych.sprintf.sprintf
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
 
 val List<Char>.str: String get() = joinToString("")
 
-    fun <T>MergeResult<T>.toTrace(source: List<T>): String {
+//    fun <T>MergeResult<T>.toTrace(source: List<T>): String {
-        val r = StringBuilder()
+//        val r = StringBuilder()
-        r.append(merged.indices.joinToString("") { "%3d".sprintf(it) } + "\n")
+//        r.append(merged.indices.joinToString("") { "%3d".sprintf(it) } + "\n")
-        r.append(merged.joinToString("") { "%3s".sprintf(it) } + "\n")
+//        r.append(merged.joinToString("") { "%3s".sprintf(it) } + "\n")
-        r.append("---- source ----\n")
+//        r.append("---- source ----\n")
-        r.append(source.joinToString("") { "%3s".sprintf(it) } + "\n")
+//        r.append(source.joinToString("") { "%3s".sprintf(it) } + "\n")
-        r.append(sourceIndices.joinToString("") { "%3s".sprintf(it) } + "\n")
+//        r.append(sourceIndices.joinToString("") { "%3s".sprintf(it) } + "\n")
-        return r.toString()
+//        return r.toString()
-    }
+//    }
 
 class BasicTest {
     @Test
@@ -27,25 +27,25 @@ class BasicTest {
         val b = "Bye world!!".toList()
 
         val m = merge3(src, b, a)
-        println(m.merged.str)
+//        println(m.merged.str)
 //        println(m.conflicts)
-        println(m.changedAreas)
+//        println(m.changedAreas)
         assertEquals("Bye cruel world!!!", m.merged.str)
 //        assertTrue(m.noConflicts)
     }
     @Test
     fun testMergeNoConflicts3() {
-        Log.connectConsole()
+// Log.connectConsole()
         val src = "Hello, world!".toList()
         val a = "Hello, friend!".toList()
         val b = "Bye world!".toList()
 
-        val m = merge3(src, a, b, true)
+        val m = merge3(src, a, b)
-        println(m.merged.str)
+//        println(m.merged.str)
 //        println(m.conflicts)
-        println(m.changedAreas)
+//        println(m.changedAreas)
         assertEquals("Bye friend!", m.merged.str)
-        println(m.toTrace(src))
+//        println(m.toTrace(src))
 //        assertTrue(m.noConflicts)
     }
 
@@ -56,103 +56,142 @@ class BasicTest {
         val b = "Bye world".toList()
 
         val m = merge3(src, b, a)
-        println(m.merged.str)
+//        println(m.merged.str)
 //        println(m.conflicts)
-        println(m.changedAreas)
+//        println(m.changedAreas)
         assertEquals("Bye friend", m.merged.str)
 //        assertTrue(m.noConflicts)
-        println(m.blocks)
+//        println(m.blocks)
     }
     @Test
     fun testMergeWithConflicts() {
-        Log.connectConsole()
+// Log.connectConsole()
         val src = "Hello world".toList()
         val a = "Hello 123".toList()
         val b = "Hello 456".toList()
 
-        val m = merge3(src, b, a, false)
+        val m = merge3(src, b, a)
-        println(m.merged.str)
+//        println(m.merged.str)
 //        println(m.conflicts)
-        println(m.changedAreas)
+//        println(m.changedAreas)
-        assertEquals("Hello 123456", m.merged.str)
+        assertEquals("Hello 456123", m.merged.str)
     }
 
     @Test
     fun testMergeIndexes() {
-        Log.connectConsole()
+// Log.connectConsole()
         val src = "Hello".toList()
         val a = "123 Hello".toList()
         val b = "456 Hello".toList()
 
-        val m = merge3(src, b, a, true)
+        val m = merge3(src, b, a)
 //        println(m.toTrace(src))
 //        println(m.changedAreas)
 //        for( b in m.blocks )
 //            println(b)
         val unchanged = m.blocks.last() as MergedBlock.Unchanged
-        println(unchanged)
+//        println(unchanged)
         assertEquals(0, unchanged.referenceIndex)
     }
 
     @Test
     fun testMergeIndexes2() {
-        Log.connectConsole()
+// Log.connectConsole()
         val src = "Hello".toList()
         val a = "1Hello".toList()
         val b = "2Hello".toList()
 
-        val m = merge3(src, b, a, true)
+        val m = merge3(src, b, a)
         val unchanged = m.blocks.last() as MergedBlock.Unchanged
-        println(unchanged)
+//        println(unchanged)
         assertEquals(0, unchanged.referenceIndex)
     }
 
     @Test
     fun testMergeFilter() {
-        Log.connectConsole()
+// Log.connectConsole()
         val source = "lxcvv".toList()
         val our = "lssdfasdwerwev".toList()
         val their = "lxcvasdfasdfs".toList()
         val result = merge3(source, their, our)
-        println("got result: ${result.toTrace(source)}")
+//        println("got result: ${result.toTrace(source)}")
-        println("got result: ${result.blocks}")
+//        println("got result: ${result.blocks}")
         result.blocks.filter { it is MergedBlock.Unchanged }
         assertTrue(true)
     }
 
     @Test
     fun testMergeEmpty() {
-        Log.connectConsole()
+// Log.connectConsole()
         val source = "".toList()
         val our = "".toList()
         val their = "".toList()
         val result = merge3(source, their, our)
-        println("got result: ${result.toTrace(source)}")
+//        println("got result: ${result.toTrace(source)}")
-        println("got result: ${result.blocks}")
+//        println("got result: ${result.blocks}")
         result.blocks.filter { it is MergedBlock.Unchanged }
         assertTrue(true)
     }
 
     @Test
-    fun testMergeUnchanged() {
+    fun testMergeUnchanged1() {
-        Log.connectConsole()
         val source = "abc".toList()
-        val their = "abDEF".toList()
+        val their = "abcDEF".toList()
-        val our = "abcGHY".toList()
+        val our = "abcDEF".toList()
 
         val result = merge3(source, their, our)
-        println(result.merged.str)
+//        println(result.merged.str)
-        assertTrue(false)
+//        println(result.blocks)
+        assertEquals("abcDEF", result.merged.str)
     }
 
     @Test
-    fun testMergeConflictOrder() {
+    fun testMergePartial1() {
+        val source = "abc".toList()
+        val their = "abcDEF1".toList()
+        val our = "abcDEF".toList()
+
+        val result = merge3(source, their, our)
+//        println(result.merged.str)
+//        println(result.blocks)
+        assertEquals("abcDEF1", result.merged.str)
+    }
+
+    @Test
+    fun testMergePartial2() {
+        val source = "abc".toList()
+        val their = "abcDEF".toList()
+        val our = "abcDEF1".toList()
+
+        val result = merge3(source, their, our)
+//        println(result.merged.str)
+//        println(result.blocks)
+        assertEquals("abcDEF1", result.merged.str)
+    }
+
+    @Test
+    fun testMergeConflictOrder1() {
+// Log.connectConsole()
+        val source = "abc".toList()
+        val their = "abcDEF".toList()
+        val our = "abcGHY".toList()
+
+        val result = merge3(source, their, our)
+//        println(result.merged.str)
+//        println(result.blocks)
+        // the order is unexpected:
+        assertTrue { result.merged.str in listOf("abcDEFGHY", "abcGHYDEF") }
+    }
+
+    @Test
+    fun testMergeConflictOrder2() {
         val source = "ABAB".toList()
         val our = "ACAC".toList()
         val their = "ADAD".toList()
 
         val result = merge3(source, their, our)
-        println(result.merged.str)
+//        println(result.merged.str)
-        assertTrue(false)
+        // The order is undetermied:
+        assertTrue(result.merged.str in listOf("ACDADC", "ADCACD", "ADCADC", "ACDACD"))
     }
 }