Fix strict null errors in terminalColorRegistry

src/tsconfig.strictNullChecks.json

@@ -792,7 +792,8 @@
 		"./vs/workbench/services/title/common/titleService.ts",
 		"./vs/workbench/services/workspace/common/workspaceEditing.ts",
 		"./vs/workbench/test/common/editor/editorOptions.test.ts",
-		"./vs/workbench/test/electron-browser/api/mock.ts"
+		"./vs/workbench/test/electron-browser/api/mock.ts",
+		"./vs/workbench/parts/terminal/test/electron-browser/terminalColorRegistry.test.ts"
 	],
 	"exclude": [
 		"./typings/require-monaco.d.ts"

src/vs/workbench/parts/terminal/test/electron-browser/terminalColorRegistry.test.ts

@@ -18,7 +18,7 @@ function getMockTheme(type: ThemeType): ITheme {
 		selector: '',
 		label: '',
 		type: type,
-		getColor: (colorId: ColorIdentifier): Color => themingRegistry.resolveDefaultColor(colorId, theme),
+		getColor: (colorId: ColorIdentifier) => themingRegistry.resolveDefaultColor(colorId, theme),
 		defines: () => true
 	};
 	return theme;
@@ -28,7 +28,7 @@ suite('Workbench - TerminalColorRegistry', () => {
 
 	test('hc colors', function () {
 		let theme = getMockTheme('hc');
-		let colors = ansiColorIdentifiers.map(colorId => Color.Format.CSS.formatHexA(theme.getColor(colorId), true));
+		let colors = ansiColorIdentifiers.map(colorId => Color.Format.CSS.formatHexA(theme.getColor(colorId)!, true));
 
 		assert.deepEqual(colors, [
 			'#000000',
@@ -53,7 +53,7 @@ suite('Workbench - TerminalColorRegistry', () => {
 
 	test('light colors', function () {
 		let theme = getMockTheme('light');
-		let colors = ansiColorIdentifiers.map(colorId => Color.Format.CSS.formatHexA(theme.getColor(colorId), true));
+		let colors = ansiColorIdentifiers.map(colorId => Color.Format.CSS.formatHexA(theme.getColor(colorId)!, true));
 
 		assert.deepEqual(colors, [
 			'#000000',
@@ -78,7 +78,7 @@ suite('Workbench - TerminalColorRegistry', () => {
 
 	test('dark colors', function () {
 		let theme = getMockTheme('dark');
-		let colors = ansiColorIdentifiers.map(colorId => Color.Format.CSS.formatHexA(theme.getColor(colorId), true));
+		let colors = ansiColorIdentifiers.map(colorId => Color.Format.CSS.formatHexA(theme.getColor(colorId)!, true));
 
 		assert.deepEqual(colors, [
 			'#000000',