[Fix] TSNonNullExpression: handle ThisExpressions

Fixes #108

CHANGELOG.md

@@ -1,5 +1,7 @@
 Unreleased
 ==================
+- [New] add support for fragment syntax (`<>`) (#108)
+- [Fix] `TSNonNullExpression`: handle `ThisExpression`s (#108)
 
 3.1.0 / 2020-10-13
 ==================

__tests__/src/getPropLiteralValue-babelparser-test.js

@@ -518,5 +518,12 @@ describe('getLiteralPropValue', () => {
 
       assert.equal(actual, expected);
     });
+
+    it('should work with a this.props value', () => {
+      const prop = extractProp('<a href={this.props.href!}>Download</a>');
+      const expected = null;
+      const actual = getLiteralPropValue(prop);
+      assert.equal(actual, expected);
+    });
   });
 });

__tests__/src/getPropValue-babelparser-test.js

@@ -1174,5 +1174,12 @@ describe('getPropValue', () => {
       const actual = getPropValue(prop);
       assert.equal(actual, expected);
     });
+
+    it('should work with a this.props value', () => {
+      const prop = extractProp('<a foo={this.props.href!}>Download</a>');
+      const expected = 'this.props.href!';
+      const actual = getPropValue(prop);
+      assert.equal(actual, expected);
+    });
   });
 });

src/values/expressions/TSNonNullExpression.js

@@ -1,3 +1,5 @@
+const extractValueFromThisExpression = require('./ThisExpression').default;
+
 /**
  * Extractor function for a TSNonNullExpression type value node.
  * A TSNonNullExpression is accessing a TypeScript Non-Null Assertion
@@ -18,6 +20,10 @@ export default function extractValueFromTSNonNullExpression(value) {
     return name;
   }
 
+  if (value.type === 'ThisExpression') {
+    return extractValueFromThisExpression();
+  }
+
   // does not contains properties & is not parenthesized
   if (value.type === 'TSNonNullExpression' && (!value.extra || value.extra.parenthesized === false)) {
     const { expression } = value;