From 64f34dbf59636ba4820f17624671915d9b0b33c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20Har=C4=99=C5=BClak?= <harezlak.robert7@gmail.com>
Date: Sat, 25 Aug 2018 12:33:26 +0200
Subject: [PATCH] Add is-present helper

---
 README.md                             |  3 +-
 addon/helpers/is-present.js           |  6 ++++
 app/helpers/is-present.js             |  1 +
 tests/unit/helpers/is-present-test.js | 48 +++++++++++++++++++++++++++
 4 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100644 addon/helpers/is-present.js
 create mode 100644 app/helpers/is-present.js
 create mode 100644 tests/unit/helpers/is-present-test.js

diff --git a/README.md b/README.md
index f027a52..26038a8 100644
--- a/README.md
+++ b/README.md
@@ -17,8 +17,9 @@ gte      | `if (a >= b)`                                 | `{{if (gte a b)}}`
 lt       | `if (a < b)`                                  | `{{if (lt a b)}}`       | No                              |
 lte      | `if (a <= b)`                                 | `{{if (lte a b)}}`      | No                              |
 is-array | `if (Ember.isArray(a))`                       | `{{if (is-array a)}}`   | Yes                             |
-is-empty | `if (Ember.isEmpty(a))`                       | `{{if (is-empty a)}}`   | No                             |
+is-empty | `if (Ember.isEmpty(a))`                       | `{{if (is-empty a)}}`   | No                              |
 is-equal | `if (Ember.isEqual(a, b))`                    | `{{if (is-equal a b)}}` | No                              |
+is-present | `if (Ember.isPresent(a))`                   | `{{if (is-present a)}}` | No                              |
 
 ### API
 
diff --git a/addon/helpers/is-present.js b/addon/helpers/is-present.js
new file mode 100644
index 0000000..b163239
--- /dev/null
+++ b/addon/helpers/is-present.js
@@ -0,0 +1,6 @@
+import { helper } from '@ember/component/helper';
+import { isPresent } from '@ember/utils';
+
+export default helper(function([obj]) {
+  return isPresent(obj)
+})
diff --git a/app/helpers/is-present.js b/app/helpers/is-present.js
new file mode 100644
index 0000000..d54955b
--- /dev/null
+++ b/app/helpers/is-present.js
@@ -0,0 +1 @@
+export { default } from 'ember-truth-helpers/helpers/is-present';
diff --git a/tests/unit/helpers/is-present-test.js b/tests/unit/helpers/is-present-test.js
new file mode 100644
index 0000000..02c75da
--- /dev/null
+++ b/tests/unit/helpers/is-present-test.js
@@ -0,0 +1,48 @@
+import { module, test } from 'qunit';
+import { setupRenderingTest } from 'ember-qunit';
+import { render } from '@ember/test-helpers';
+import hbs from 'htmlbars-inline-precompile';
+
+module('helper:is-present', function(hooks) {
+  setupRenderingTest(hooks);
+
+  test('undefined/null values', async function(assert) {
+    this.set('thisIsUndefined', undefined)
+    this.set('thisIsNull', null)
+    this.set('thisIsNotNull', new Date())
+    await render(hbs("[{{is-present thisIsUndefined}}] [{{is-present thisIsNull}}] [{{is-present thisIsNotNull}}]"));
+
+    assert.equal(this.$().text(), '[false] [false] [true]', 'value should be "[false] [false] [true]"');
+  });
+
+  test('boolean values', async function(assert) {
+    await render(hbs("[{{is-present true}}] [{{is-present false}}]"));
+
+    assert.equal(this.$().text(), '[true] [true]', 'value should be "[true] [true]"');
+  });
+
+  test('objects', async function(assert) {
+    this.set('presentObject', {})
+    this.set('notpresentObject', { some: 'object' })
+    await render(hbs("[{{is-present presentObject}}] [{{is-present notpresentObject}}]"));
+
+    assert.equal(this.$().text(), '[true] [true]', 'value should be "[true] [true]"');
+  });
+
+  test('arrays', async function(assert) {
+    this.set('presentArray', [])
+    this.set('notpresentArray', [ 'a', 8, {} ])
+    await render(hbs("[{{is-present presentArray}}] [{{is-present notpresentArray}}]"));
+
+    assert.equal(this.$().text(), '[false] [true]', 'value should be "[false] [true]"');
+  });
+
+  test('strings', async function(assert) {
+    this.set('presentString', '')
+    this.set('whitespaceString', '   ')
+    this.set('notpresentString', 'full of text')
+    await render(hbs("[{{is-present presentString}}] [{{is-present whitespaceString}}] [{{is-present notpresentString}}]"));
+
+    assert.equal(this.$().text(), '[false] [false] [true]', 'value should be "[false] [false] [true]"');
+  });
+});