Added tests for declaration emit.

Author: DanielRosenwasser

tests/cases/conformance/declarationEmit/typePredicates/declarationEmitIdentifierPredicates01.ts

@@ -0,0 +1,6 @@
+// @declaration: true
+// @module: commonjs
+
+export function f(x: any): x is number {
+    return typeof x === "number";
+}

tests/cases/conformance/declarationEmit/typePredicates/declarationEmitIdentifierPredicatesWithPrivateName01.ts

@@ -0,0 +1,10 @@
+// @declaration: true
+// @module: commonjs
+
+interface I {
+    a: number;
+}
+
+export function f(x: any): x is I {
+    return typeof x.a === "number";
+}

tests/cases/conformance/declarationEmit/typePredicates/declarationEmitThisPredicates01.ts

@@ -0,0 +1,11 @@
+// @declaration: true
+// @module: commonjs
+
+export class C {
+    m(): this is D {
+        return this instanceof D;
+    }
+}
+
+export class D extends C {
+}

tests/cases/conformance/declarationEmit/typePredicates/declarationEmitThisPredicates02.ts

@@ -0,0 +1,15 @@
+// @declaration: true
+// @module: commonjs
+
+export interface Foo {
+    a: string;
+    b: number;
+    c: boolean;
+}
+
+export const obj = {
+    m(): this is Foo {
+        let dis = this as Foo;
+        return dis.a != null && dis.b != null && dis.c != null;
+    }
+}

tests/cases/conformance/declarationEmit/typePredicates/declarationEmitThisPredicatesWithPrivateName01.ts

@@ -0,0 +1,11 @@
+// @declaration: true
+// @module: commonjs
+
+export class C {
+    m(): this is D {
+        return this instanceof D;
+    }
+}
+
+class D extends C {
+}

tests/cases/conformance/declarationEmit/typePredicates/declarationEmitThisPredicatesWithPrivateName02.ts

@@ -0,0 +1,15 @@
+// @declaration: true
+// @module: commonjs
+
+interface Foo {
+    a: string;
+    b: number;
+    c: boolean;
+}
+
+export const obj = {
+    m(): this is Foo {
+        let dis = this as Foo;
+        return dis.a != null && dis.b != null && dis.c != null;
+    }
+}