Add tests for collapseToStart/End when selected node is void (#1038)

test/transforms/fixtures/on-selection/collapse-to-end/void/index.js

@@ -0,0 +1,29 @@
+
+import assert from 'assert'
+
+export default function (state) {
+  const { document, selection } = state
+  const texts = document.getTexts()
+  const first = texts.get(0)
+
+  const next = state
+    .transform()
+    .select({
+      anchorKey: first.key,
+      anchorOffset: 0,
+      focusKey: first.key,
+      focusOffset: 1
+    })
+    .collapseToEnd()
+    .apply()
+
+  assert.deepEqual(next.selection.toJS(), {
+    anchorKey: first.key,
+    anchorOffset: 1,
+    focusKey: first.key,
+    focusOffset: 1,
+    isBackward: false,
+    isFocused: false,
+    marks: null,
+  })
+}

test/transforms/fixtures/on-selection/collapse-to-end/void/input.yaml

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+
+nodes:
+  - kind: block
+    type: image
+    isVoid: true

test/transforms/fixtures/on-selection/collapse-to-start/void/index.js

@@ -0,0 +1,29 @@
+
+import assert from 'assert'
+
+export default function (state) {
+  const { document, selection } = state
+  const texts = document.getTexts()
+  const first = texts.get(0)
+
+  const next = state
+    .transform()
+    .select({
+      anchorKey: first.key,
+      anchorOffset: 0,
+      focusKey: first.key,
+      focusOffset: 1
+    })
+    .collapseToStart()
+    .apply()
+
+  assert.deepEqual(next.selection.toJS(), {
+    anchorKey: first.key,
+    anchorOffset: 0,
+    focusKey: first.key,
+    focusOffset: 0,
+    isBackward: false,
+    isFocused: false,
+    marks: null,
+  })
+}

test/transforms/fixtures/on-selection/collapse-to-start/void/input.yaml

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+
+nodes:
+  - kind: block
+    type: image
+    isVoid: true