Add test + reshuffle/rename new code

tests/cases/fourslash/codeFixInferFromUsageAddition.ts

@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: true
+//// function foo([|a, m |]) {
+////     return a + m
+//// }
+
+verify.rangeAfterCodeFix("a: any, m: any", /*includeWhiteSpace*/ undefined, /*errorCode*/ undefined, /*index*/0);
+

tests/cases/fourslash/codeFixInferFromUsageArray.ts

@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: true
+//// function foo([|p, a, b, c, d, e |]) {
+////     var x: string = a.pop()
+////     b.reverse()
+////     var rr: boolean[] = c.reverse()
+////     d.some(t => t > 1); // can't infer from callbacks right now
+////     var y = e.concat(12); // can't infer from overloaded functions right now
+////     return p.push(12)
+//// }
+
+verify.rangeAfterCodeFix("p: number[], a: string[], b: any[], c: boolean[], d: any[], e: number[]", /*includeWhiteSpace*/ undefined, /*errorCode*/ undefined, /*index*/0);
+

tests/cases/fourslash/codeFixInferFromUsageLiteralTypes.ts

@@ -0,0 +1,10 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: true
+//// function foo([|a, m |]) {
+////     a = 'hi'
+////     m = 1
+//// }
+
+verify.rangeAfterCodeFix("a: string, m: number", /*includeWhiteSpace*/ undefined, /*errorCode*/ undefined, /*index*/0);
+

tests/cases/fourslash/codeFixInferFromUsagePromise.ts

@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: true
+//// function foo([|p |]) {
+////     return p.then((x: string[]) => x[0])
+//// }
+
+verify.rangeAfterCodeFix("p: Promise<string[]>", /*includeWhiteSpace*/ undefined, /*errorCode*/ undefined, /*index*/0);
+

tests/cases/fourslash/codeFixInferFromUsageString.ts

@@ -0,0 +1,12 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: true
+//// function foo([|p, a, b, c, d |]) {
+////     var x
+////     p.charAt(x)
+////     a.charAt(0)
+////     b.concat('hi')
+//// }
+
+verify.rangeAfterCodeFix("p: string, a: string, b: string | string[]", /*includeWhiteSpace*/ undefined, /*errorCode*/ undefined, /*index*/0);
+