add tests for different issues

tests/friendly_errors/issue_7210.js

@@ -0,0 +1,3 @@
+// @flow
+type Foo = {| +foo: ?string |};
+const test = (bar: Foo): Foo => ({ foo: 'foo', ...bar});

tests/friendly_errors/issue_7242.js

@@ -0,0 +1,9 @@
+// @flow
+
+type Ob = {|+foo: {| +bar: string |}|};
+declare var update: Ob;
+({ foo: { bar: 'valid' }, ...update }: Ob); // Ok
+
+type NestedOb = {|+foo: {| +bar: {| +foo: number |} |}|};
+declare var update2: NestedOb;
+({ foo: { bar: { foo: 123 } }, ...update2 }: NestedOb); // Ok

tests/inexact-object-spread/inexact-object-spread.exp

@@ -0,0 +1 @@
+Found 0 errors

tests/inexact-object-spread/issue_6751.js

@@ -0,0 +1,15 @@
+/* @flow */
+
+type A = { foo: ?string };
+
+function foo(a: A) {
+}
+
+const a: A = { foo: 'foo' };
+const b = { foo: 'foo' };
+
+foo({ ...a, foo: 'foo' }); // OK
+foo({ foo: 'foo', ...a }); // OK
+
+foo({ ...b, foo: 'foo' }); // OK
+foo({ foo: 'foo', ...b }); // OK

tests/spread/issue_6108.js

@@ -0,0 +1,11 @@
+// @flow
+
+type A = {
+  a: number
+};
+
+type B = {
+  a: string
+};
+
+const testFn = (input: A): B => ({...input, a: 'uh oh :/'});