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PiperOrigin-RevId: 789729979

Author: varomodt

test/com/google/javascript/jscomp/InlineFunctionsTest.java

@@ -257,6 +257,71 @@ function foo(){ return 4 }
         "4");
   }
 
+  @Test
+  public void testInlineFunctions1_arrowFn() {
+    test(
+        """
+        const foo = () => 4;
+        foo();
+        """,
+        "4");
+  }
+
+  @Test
+  public void testInlineFunctions1_arrowFn_block() {
+    test(
+        """
+        const foo = () => { return 4; };
+        foo();
+        """,
+        "4");
+  }
+
+  @Test
+  public void testInlineFunctions1_inArrowFn() {
+    test(
+        """
+        const foo = () => 4;
+        (() => foo())();
+        """,
+        "4");
+  }
+
+  @Test
+  public void testInlineFunctions1_inArrowFn_block() {
+    test(
+        """
+        const foo = () => 4;
+        (() => {
+          let a = foo();
+          [].forEach(() => a += 1);
+          return a;
+        })();
+        """,
+        // Why is the IIFE not inlined here?
+        // This happens whether or not the function references
+        // a local.
+        """
+        (() => {
+          let a = 4;
+          [].forEach(() => {
+            return a = a + 1;
+          });
+          return a;
+        })();
+        """);
+  }
+
+  @Test
+  public void testInlineFunctions1_arrowFnArg() {
+    test(
+        """
+        const bar = (f) => f();
+        bar(() => 4);
+        """,
+        "4");
+  }
+
   @Test
   public void testInlineFunctions2() {
     // inline simple constants