Revert "Fix previewing a file w/ no functions (#5390)"

This reverts commit a290b11.

Author: jasonLaster

src/test/mochitest/browser.ini

@@ -76,7 +76,6 @@ support-files =
   examples/doc-debugger-statements.html
   examples/doc-minified.html
   examples/doc-minified2.html
-  examples/doc-on-load.html
   examples/doc-sourcemaps.html
   examples/doc-sourcemaps2.html
   examples/doc-sourcemaps3.html
@@ -92,7 +91,6 @@ support-files =
   examples/long.js
   examples/math.min.js
   examples/nested/nested-source.js
-  examples/top-level.js
   examples/opts.js
   examples/output.js
   examples/simple1.js
@@ -145,8 +143,6 @@ skip-if = os == "win"
 [browser_dbg-pretty-print-paused.js]
 [browser_dbg-preview.js]
 skip-if = os == "win"
-[browser_dbg-preview-module.js]
-skip-if = os == "win"
 [browser_dbg-preview-source-maps.js]
 skip-if = os == "win"
 [browser_dbg-returnvalues.js]

src/test/mochitest/browser_dbg-preview-module.js

@@ -18,7 +18,7 @@ function hoverAtPos(dbg, { line, ch }) {
   );
 }
 
-function assertPreviewTooltip(dbg, { result, expression }) {
+function assertTooltip(dbg, { result, expression }) {
   const previewEl = findElement(dbg, "tooltip");
   is(previewEl.innerText, result, "Preview text shown to user");
 
@@ -28,7 +28,7 @@ function assertPreviewTooltip(dbg, { result, expression }) {
   is(preview.expression, expression, "Preview.expression");
 }
 
-function assertPreviewPopup(dbg, { field, value, expression }) {
+function assertPopup(dbg, { field, value, expression }) {
   const previewEl = findElement(dbg, "popup");
   is(previewEl.innerText, "", "Preview text shown to user");
 
@@ -59,5 +59,5 @@ add_task(async function() {
   hoverAtPos(dbg, { line: 2, ch: 9 });
 
   await tooltipPreviewed;
-  assertPreviewTooltip(dbg, { result: 4, expression: "x" });
+  assertTooltip(dbg, { result: 4, expression: "x" });
 });

src/test/mochitest/browser_dbg-preview-source-maps.js

@@ -1,8 +1,46 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
-// Test hovering on an object, which will show a popup and on a
-// simple value, which will show a tooltip.
+function getCoordsFromPosition(cm, { line, ch }) {
+  return cm.charCoords({ line: ~~line, ch: ~~ch });
+}
+
+function hoverAtPos(dbg, { line, ch }) {
+  const cm = getCM(dbg);
+  const coords = getCoordsFromPosition(cm, { line: line - 1, ch });
+  const tokenEl = dbg.win.document.elementFromPoint(coords.left, coords.top);
+  tokenEl.dispatchEvent(
+    new MouseEvent("mouseover", {
+      bubbles: true,
+      cancelable: true,
+      view: dbg.win
+    })
+  );
+}
+
+async function assertTooltip(dbg, { result, expression }) {
+  const previewEl = await waitForElement(dbg, "tooltip");
+  is(previewEl.innerText, result, "Preview text shown to user");
+
+  const preview = dbg.selectors.getPreview(dbg.getState());
+  is(`${preview.result}`, result, "Preview.result");
+  is(preview.updating, false, "Preview.updating");
+  is(preview.expression, expression, "Preview.expression");
+}
+
+async function assertPreviewPopup(dbg, { field, value, expression }) {
+  const previewEl = await waitForElement(dbg, "popup");
+  const preview = dbg.selectors.getPreview(dbg.getState());
+
+  is(
+    `${preview.result.preview.ownProperties[field].value}`,
+    value,
+    "Preview.result"
+  );
+  is(preview.updating, false, "Preview.updating");
+  is(preview.expression, expression, "Preview.expression");
+}
+
 add_task(async function() {
   const dbg = await initDebugger("doc-scripts.html");
   const { selectors: { getSelectedSource }, getState } = dbg;
@@ -18,7 +56,7 @@ add_task(async function() {
   const tooltipPreviewed = waitForDispatch(dbg, "SET_PREVIEW");
   hoverAtPos(dbg, { line: 5, ch: 12 });
   await tooltipPreviewed;
-  await assertPreviewTooltip(dbg, { result: "3", expression: "result" });
+  await assertTooltip(dbg, { result: "3", expression: "result" });
 
   const popupPreviewed = waitForDispatch(dbg, "SET_PREVIEW");
   hoverAtPos(dbg, { line: 2, ch: 10 });

src/test/mochitest/browser_dbg-preview.js

@@ -1084,46 +1084,6 @@ function getCM(dbg) {
   return el.CodeMirror;
 }
 
-function getCoordsFromPosition(cm, { line, ch }) {
-  return cm.charCoords({ line: ~~line, ch: ~~ch });
-}
-
-function hoverAtPos(dbg, { line, ch }) {
-  const cm = getCM(dbg);
-  const coords = getCoordsFromPosition(cm, { line: line - 1, ch });
-  const tokenEl = dbg.win.document.elementFromPoint(coords.left, coords.top);
-  tokenEl.dispatchEvent(
-    new MouseEvent("mouseover", {
-      bubbles: true,
-      cancelable: true,
-      view: dbg.win
-    })
-  );
-}
-
-async function assertPreviewTooltip(dbg, { result, expression }) {
-  const previewEl = await waitForElement(dbg, "tooltip");
-  is(previewEl.innerText, result, "Preview text shown to user");
-
-  const preview = dbg.selectors.getPreview(dbg.getState());
-  is(`${preview.result}`, result, "Preview.result");
-  is(preview.updating, false, "Preview.updating");
-  is(preview.expression, expression, "Preview.expression");
-}
-
-async function assertPreviewPopup(dbg, { field, value, expression }) {
-  const previewEl = await waitForElement(dbg, "popup");
-  const preview = dbg.selectors.getPreview(dbg.getState());
-
-  is(
-    `${preview.result.preview.ownProperties[field].value}`,
-    value,
-    "Preview.result"
-  );
-  is(preview.updating, false, "Preview.updating");
-  is(preview.expression, expression, "Preview.expression");
-}
-
 // NOTE: still experimental, the screenshots might not be exactly correct
 async function takeScreenshot(dbg) {
   let canvas = dbg.win.document.createElementNS(