fix: don't set tabSize when tab_width is unset (#439)

Author: SunsetTechuila

src/api.ts

@@ -157,7 +157,10 @@ export function fromEditorConfig(
 
 	if (Number.isInteger(config.tab_width)) {
 		resolved.tabSize = config.tab_width
-	} else if (Number.isInteger(config.indent_size)) {
+	} else if (
+		Number.isInteger(config.indent_size) &&
+		config.tab_width !== 'unset'
+	) {
 		resolved.tabSize = config.indent_size
 	}
 

src/test/suite/api.test.ts

@@ -181,6 +181,21 @@ suite('EditorConfig extension', () => {
 					indentSize: 2,
 				},
 			},
+			{
+				config: {
+					indent_style: 'tab',
+					indent_size: 8,
+					tab_width: 'unset',
+				},
+				defaults: {
+					tabSize: 2,
+				},
+				expected: {
+					insertSpaces: false,
+					indentSize: 8,
+					tabSize: 2,
+				},
+			},
 		].forEach(scenario => {
 			assert.deepStrictEqual(
 				api.fromEditorConfig(scenario.config as KnownProps, scenario.defaults),