tests

test/isoLens.js

@@ -0,0 +1,38 @@
+var R = require('../source/index.js');
+var eq = require('./shared/eq.js');
+
+var they = it;
+
+var fromPosJson = R.pipe(JSON.parse, value => ({ x: Number.parseFloat(value['@x']), y: Number.parseFloat(value['@y']) }));
+var toPosJson = R.pipe(v => ({ '@x': v.x.toString(), '@y': v.y.toString() }), JSON.stringify);
+
+
+var positionJsonLens = R.lensIso(fromPosJson, toPosJson);
+var foobarLens = R.lensProp('foobar');
+
+var objLens = R.compose(foobarLens, positionJsonLens);
+
+var obj = {
+  foobar: '{"@x":"4","@y":"2"}'
+};
+
+
+describe('lensIso :: view, set, over', function() {
+  they('view', function() {
+    eq(R.view(objLens, obj), { x: 4, y: 2 });
+  });
+
+  they('set', function() {
+    const newObj = R.set(objLens, { x: 1, y: 100 }, obj);
+    eq(newObj, {
+      foobar: '{"@x":"1","@y":"100"}'
+    });
+  });
+
+  they('over', function() {
+    const newObj = R.over(objLens, R.map(x => x * 2), obj);
+    eq(newObj, {
+      foobar: '{"@x":"8","@y":"4"}'
+    });
+  });
+});