Add regression test

microsoft · ahejlsberg · Mar 26, 2021 · Mar 25, 2021 · Mar 25, 2021 · Mar 25, 2021
commit c8ce5c6494048987a2028436e6164d1d65f12c46
diff --git a/tests/baselines/reference/templateLiteralTypes2.errors.txt b/tests/baselines/reference/templateLiteralTypes2.errors.txt
@@ -120,4 +120,10 @@ tests/cases/conformance/types/literal/templateLiteralTypes2.ts(70,9): error TS23
     const pixelString: PixelValueType = `22px`;
 
     const pixelStringWithTemplate: PixelValueType = `${pixelValue}px`;
+
+    // Repro from #43143
+
+    function getCardTitle(title: string): `test-${string}` {
+        return `test-${title}`;
+    }
 
diff --git a/tests/baselines/reference/templateLiteralTypes2.js b/tests/baselines/reference/templateLiteralTypes2.js
@@ -97,6 +97,12 @@ type PixelValueType = `${number}px`;
 const pixelString: PixelValueType = `22px`;
 
 const pixelStringWithTemplate: PixelValueType = `${pixelValue}px`;
+
+// Repro from #43143
+
+function getCardTitle(title: string): `test-${string}` {
+    return `test-${title}`;
+}
 
 
 //// [templateLiteralTypes2.js]
@@ -172,6 +178,10 @@ var t5 = takesLiteral("foo.bar." + someUnion); // "abc" | "def" | "ghi"
 var pixelValue = 22;
 var pixelString = "22px";
 var pixelStringWithTemplate = pixelValue + "px";
+// Repro from #43143
+function getCardTitle(title) {
+    return "test-" + title;
+}
 
 
 //// [templateLiteralTypes2.d.ts]
@@ -199,3 +209,4 @@ declare const pixelValue: number;
 declare type PixelValueType = `${number}px`;
 declare const pixelString: PixelValueType;
 declare const pixelStringWithTemplate: PixelValueType;
+declare function getCardTitle(title: string): `test-${string}`;
diff --git a/tests/baselines/reference/templateLiteralTypes2.symbols b/tests/baselines/reference/templateLiteralTypes2.symbols
@@ -322,3 +322,13 @@ const pixelStringWithTemplate: PixelValueType = `${pixelValue}px`;
 >PixelValueType : Symbol(PixelValueType, Decl(templateLiteralTypes2.ts, 91, 30))
 >pixelValue : Symbol(pixelValue, Decl(templateLiteralTypes2.ts, 91, 5))
 
+// Repro from #43143
+
+function getCardTitle(title: string): `test-${string}` {
+>getCardTitle : Symbol(getCardTitle, Decl(templateLiteralTypes2.ts, 97, 66))
+>title : Symbol(title, Decl(templateLiteralTypes2.ts, 101, 22))
+
+    return `test-${title}`;
+>title : Symbol(title, Decl(templateLiteralTypes2.ts, 101, 22))
+}
+
diff --git a/tests/baselines/reference/templateLiteralTypes2.types b/tests/baselines/reference/templateLiteralTypes2.types
@@ -354,3 +354,14 @@ const pixelStringWithTemplate: PixelValueType = `${pixelValue}px`;
 >`${pixelValue}px` : `${number}px`
 >pixelValue : number
 
+// Repro from #43143
+
+function getCardTitle(title: string): `test-${string}` {
+>getCardTitle : (title: string) => `test-${string}`
+>title : string
+
+    return `test-${title}`;
+>`test-${title}` : `test-${string}`
+>title : string
+}
+
diff --git a/tests/cases/conformance/types/literal/templateLiteralTypes2.ts b/tests/cases/conformance/types/literal/templateLiteralTypes2.ts
@@ -99,3 +99,9 @@ type PixelValueType = `${number}px`;
 const pixelString: PixelValueType = `22px`;
 
 const pixelStringWithTemplate: PixelValueType = `${pixelValue}px`;
+
+// Repro from #43143
+
+function getCardTitle(title: string): `test-${string}` {
+    return `test-${title}`;
+}