Add test for initial behavior

Author: jakebailey

tests/baselines/reference/controlFlowCommaExpressionAssertionMultiple.js

@@ -0,0 +1,17 @@
+//// [controlFlowCommaExpressionAssertionMultiple.ts]
+function Narrow<T>(value: any): asserts value is T {}
+
+function func(foo: any, bar: any) {
+    Narrow<number>(foo), Narrow<string>(bar);
+    foo;
+    bar;
+}
+
+
+//// [controlFlowCommaExpressionAssertionMultiple.js]
+function Narrow(value) { }
+function func(foo, bar) {
+    Narrow(foo), Narrow(bar);
+    foo;
+    bar;
+}

tests/baselines/reference/controlFlowCommaExpressionAssertionMultiple.symbols

@@ -0,0 +1,26 @@
+=== tests/cases/compiler/controlFlowCommaExpressionAssertionMultiple.ts ===
+function Narrow<T>(value: any): asserts value is T {}
+>Narrow : Symbol(Narrow, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 0))
+>T : Symbol(T, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 16))
+>value : Symbol(value, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 19))
+>value : Symbol(value, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 19))
+>T : Symbol(T, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 16))
+
+function func(foo: any, bar: any) {
+>func : Symbol(func, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 53))
+>foo : Symbol(foo, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 2, 14))
+>bar : Symbol(bar, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 2, 23))
+
+    Narrow<number>(foo), Narrow<string>(bar);
+>Narrow : Symbol(Narrow, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 0))
+>foo : Symbol(foo, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 2, 14))
+>Narrow : Symbol(Narrow, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 0, 0))
+>bar : Symbol(bar, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 2, 23))
+
+    foo;
+>foo : Symbol(foo, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 2, 14))
+
+    bar;
+>bar : Symbol(bar, Decl(controlFlowCommaExpressionAssertionMultiple.ts, 2, 23))
+}
+

tests/baselines/reference/controlFlowCommaExpressionAssertionMultiple.types

@@ -0,0 +1,26 @@
+=== tests/cases/compiler/controlFlowCommaExpressionAssertionMultiple.ts ===
+function Narrow<T>(value: any): asserts value is T {}
+>Narrow : <T>(value: any) => asserts value is T
+>value : any
+
+function func(foo: any, bar: any) {
+>func : (foo: any, bar: any) => void
+>foo : any
+>bar : any
+
+    Narrow<number>(foo), Narrow<string>(bar);
+>Narrow<number>(foo), Narrow<string>(bar) : void
+>Narrow<number>(foo) : void
+>Narrow : <T>(value: any) => asserts value is T
+>foo : any
+>Narrow<string>(bar) : void
+>Narrow : <T>(value: any) => asserts value is T
+>bar : any
+
+    foo;
+>foo : number
+
+    bar;
+>bar : any
+}
+

tests/cases/compiler/controlFlowCommaExpressionAssertionMultiple.ts

@@ -0,0 +1,7 @@
+function Narrow<T>(value: any): asserts value is T {}
+
+function func(foo: any, bar: any) {
+    Narrow<number>(foo), Narrow<string>(bar);
+    foo;
+    bar;
+}