map literals

lynglib/src/commonTest/kotlin/MapLiteralTest.kt

@@ -0,0 +1,144 @@
+/*
+ * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+/*
+ * Map literal and merging tests
+ */
+
+import kotlinx.coroutines.test.runTest
+import net.sergeych.lyng.ExecutionError
+import net.sergeych.lyng.ScriptError
+import net.sergeych.lyng.eval
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+
+class MapLiteralTest {
+
+    @Test
+    fun basicStringAndIdKeysAndShorthand() = runTest {
+        eval(
+            """
+            val x = 2
+            val y = 2
+            val m = { "a": 1, x: x*10, y: }
+            assertEquals(1, m["a"])
+            assertEquals(20, m["x"])
+            assertEquals(2, m["y"])
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun spreadsAndOverwriteOrder() = runTest {
+        eval(
+            """
+            val base = { a: 1, b: 2 }
+            val m = { a: 0, ...base, b: 3, c: 4 }
+            assertEquals(1, m["a"])  // base overwrites a:0
+            assertEquals(3, m["b"])  // literal overwrites spread
+            assertEquals(4, m["c"])  // new key
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun trailingCommaAccepted() = runTest {
+        eval(
+            """
+            val m = { "a": 1, b: 2, }
+            assertEquals(1, m["a"])
+            assertEquals(2, m["b"])
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun duplicateLiteralKeysAreCompileTimeError() = runTest {
+        assertFailsWith<ScriptError> {
+            eval("""{ foo: 1, " + '"' + "foo" + '"' + ": 2 }""".trimIndent())
+        }
+        assertFailsWith<ScriptError> {
+            eval("""{ foo:, foo: 2 }""".trimIndent())
+        }
+    }
+
+    @Test
+    fun lambdaDisambiguationWithTypedArgs() = runTest {
+        eval(
+            """
+            val f = { x: Int, y: Int -> x + y }
+            assertEquals(3, f(1,2))
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun plusMergingAndPlusAssign() = runTest {
+        eval(
+            """
+            val m1 = ("1" => 10) + ("2" => 20)
+            assertEquals(10, m1["1"])
+            assertEquals(20, m1["2"])
+
+            val m2 = { "1": 10 } + ("2" => 20)
+            assertEquals(10, m2["1"])
+            assertEquals(20, m2["2"])
+
+            val m3 = { "1": 10 } + { "2": 20 }
+            assertEquals(10, m3["1"])
+            assertEquals(20, m3["2"])
+
+            var m = { "a": 1 }
+            m += ("b" => 2)
+            assertEquals(1, m["a"])
+            assertEquals(2, m["b"])
+            """.trimIndent()
+        )
+    }
+
+    @Test
+    fun spreadNonMapIsRuntimeError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval("""{ ...[1,2,3] }""")
+        }
+    }
+
+    @Test
+    fun spreadNonStringKeysIsRuntimeError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval("""{ ...Map(1 => "x") }""")
+        }
+    }
+
+    @Test
+    fun mergeNonStringKeyIsRuntimeError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval("""
+                val e = (1 => "x")
+                { "a": 1 } + e
+            """)
+        }
+    }
+
+    @Test
+    fun shorthandUndefinedIdIsError() = runTest {
+        assertFailsWith<ExecutionError> {
+            eval("""{ z: }""")
+        }
+    }
+}

lynglib/src/commonTest/kotlin/net/sergeych/lyng/highlight/MapLiteralHighlightTest.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package net.sergeych.lyng.highlight
+
+import kotlin.test.Test
+import kotlin.test.assertTrue
+
+class MapLiteralHighlightTest {
+
+    private fun spansToLabeled(text: String, spans: List<HighlightSpan>): List<Pair<String, HighlightKind>> =
+        spans.map { text.substring(it.range.start, it.range.endExclusive) to it.kind }
+
+    @Test
+    fun highlightsMapLiteralBasics() {
+        val text = """
+            val x = 2
+            val m = { "a": 1, b: , ...base, }
+        """.trimIndent()
+
+        val spans = SimpleLyngHighlighter().highlight(text)
+        val labeled = spansToLabeled(text, spans)
+
+        // Brace punctuation
+        assertTrue(labeled.any { it.first == "{" && it.second == HighlightKind.Punctuation })
+        assertTrue(labeled.any { it.first == "}" && it.second == HighlightKind.Punctuation })
+
+        // String key and number value
+        assertTrue(labeled.any { it.first == "\"a\"" && it.second == HighlightKind.String })
+        assertTrue(labeled.any { it.first == "1" && it.second == HighlightKind.Number })
+
+        // Identifier key and shorthand (b:)
+        assertTrue(labeled.any { it.first == "b" && it.second == HighlightKind.Identifier })
+        // The colon after key is punctuation
+        assertTrue(labeled.any { it.first == ":" && it.second == HighlightKind.Punctuation })
+
+        // Spread operator
+        assertTrue(labeled.any { it.first == "..." && it.second == HighlightKind.Operator })
+
+        // Trailing comma
+        assertTrue(labeled.any { it.first == "," && it.second == HighlightKind.Punctuation })
+    }
+}