Ensure original size is included if any widths are larger and !allowUpscale

img.js

@@ -191,20 +191,20 @@ class Image {
     // Convert strings to numbers, "400" (floats are not allowed in sharp)
     valid = valid.map(width => parseInt(width, 10));
 
+    // Replace any larger-than-original widths with the original width if upscaling is not allowed.
+    // This ensures that if a larger width has been requested, we're at least providing the closest
+    // non-upscaled image that we can.
+    if (!allowUpscale) {
+      valid = valid.map(width => width > originalWidth ? originalWidth : width);
+    }
+
     // Remove duplicates (e.g., if null happens to coincide with an explicit width
-    // or a user passes in multiple duplicate values)
+    // or a user passes in multiple duplicate values, or multiple larger-than-original
+    // widths have resulted in the original width being included multiple times)
     valid = [...new Set(valid)];
 
-    // filter out large widths if upscaling is disabled
-    let filtered = valid.filter(width => allowUpscale || width <= originalWidth);
-
-    // if the only valid width was larger than the original (and no upscaling), then use the original width
-    if(valid.length > 0 && filtered.length === 0) {
-      filtered.push(originalWidth);
-    }
-
     // sort ascending
-    return filtered.sort((a, b) => a - b);
+    return valid.sort((a, b) => a - b);
   }
 
   static getFormatsArray(formats, autoFormat, svgShortCircuit) {

test/test.js

@@ -1097,3 +1097,18 @@ test("SVG files svgShortCircuit based on file size (brotli compression)", async
   t.is(stats.webp[1].format, "svg");
   t.is(stats.webp[1].width, 900);
 });
+
+test("#184: Ensure original size is included if any widths are larger", async t => {
+  // Test image is 1280px wide; before PR for 184, asking for [1500, 900] would
+  // result in only the 900px image. Now, it should result in 900px *and* 1280px
+  // images.
+  let stats = await eleventyImage("./test/bio-2017.jpg", {
+    widths: [1500, 900],
+    formats: ['jpeg'],
+    dryRun: true,
+  });
+
+  t.is(stats.jpeg.length, 2);
+  t.is(stats.jpeg[0].width, 900);
+  t.is(stats.jpeg[1].width, 1280);
+});