diff --git a/jq/README.md b/jq/README.md
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index 00000000..a4dd4d82
--- /dev/null
+++ b/jq/README.md
@@ -0,0 +1,21 @@
+# Installs
+
+[install jaq](https://github.com/01mf02/jaq#installation) (latest development version)
+
+# Failing Unit Test
+
+```shell
+./test-gilded-rose.sh
+```
+
+# TextTest Fixture
+
+```shell
+jaq -nr "$(cat gilded-rose.jq) $(cat texttest_fixture.jq)"
+```
+
+Specify days (e.g. 10 days):
+
+```shell
+jaq --arg days 10 -nr "$(cat gilded-rose.jq) $(cat texttest_fixture.jq)"
+```
diff --git a/jq/gilded-rose.jq b/jq/gilded-rose.jq
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index 00000000..e4096d57
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+++ b/jq/gilded-rose.jq
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+def update_quality:
+    [
+        foreach .[] as $item (
+            null;
+            $item |
+            if .name != "Aged Brie" and .name != "Backstage passes to a TAFKAL80ETC concert" then
+                if .quality > 0 then
+                    if .name != "Sulfuras, Hand of Ragnaros" then
+                        .quality = .quality - 1
+                    else . end
+                else . end
+            else
+                if .quality < 50 then
+                    .quality = .quality + 1
+                    |
+                    if .name == "Backstage passes to a TAFKAL80ETC concert" then
+                        if .sell_in < 11 then
+                            if .quality < 50 then
+                                .quality = .quality + 1
+                            else . end
+                        else . end
+                        |
+                        if .sell_in < 6 then
+                            if .quality < 50 then
+                                .quality = .quality + 1
+                            else . end
+                        else . end
+                    else . end
+                else . end
+            end
+            |
+            if .name != "Sulfuras, Hand of Ragnaros" then
+                .sell_in = .sell_in - 1
+            else . end
+            |
+            if .sell_in < 0 then
+                if .name != "Aged Brie" then
+                    if .name != "Backstage passes to a TAFKAL80ETC concert" then
+                        if .quality > 0 then
+                            if .name != "Sulfuras, Hand of Ragnaros" then
+                                .quality = .quality - 1
+                            else . end
+                        else . end
+                    else
+                        .quality = .quality - .quality
+                    end
+                else
+                    if .quality < 50 then
+                        .quality = .quality + 1
+                    else . end
+                end
+            else . end
+        )
+    ];
diff --git a/jq/test-gilded-rose.sh b/jq/test-gilded-rose.sh
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index 00000000..62d91240
--- /dev/null
+++ b/jq/test-gilded-rose.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+jaq -en "$(cat gilded-rose.jq)"'[{name:"foo",sell_in:0,quality:0}] | update_quality | .[].name == "fixme"'
diff --git a/jq/texttest_fixture.jq b/jq/texttest_fixture.jq
new file mode 100644
index 00000000..477147bb
--- /dev/null
+++ b/jq/texttest_fixture.jq
@@ -0,0 +1,22 @@
+"OMGHAI!",
+(
+    [
+        { name: "+5 Dexterity Vest", sell_in: 10, quality: 20 },
+        { name: "Aged Brie", sell_in: 2, quality: 0 },
+        { name: "Elixir of the Mongoose", sell_in: 5, quality: 7 },
+        { name: "Sulfuras, Hand of Ragnaros", sell_in: 0, quality: 80 },
+        { name: "Sulfuras, Hand of Ragnaros", sell_in: 1, quality: 80 },
+        { name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 15, quality: 20 },
+        { name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 10, quality: 49 },
+        { name: "Backstage passes to a TAFKAL80ETC concert", sell_in: 5, quality: 49 },
+        { name: "Conjured Mana Cake", sell_in: 3, quality: 6}  # <-- :O
+    ] |
+    { items: ., day: 0 } |
+    recurse(.day += 1 | .items = (.items | update_quality); .day < ($ARGS.named.days // 2 | tonumber)) |
+    (
+        "",
+        (["-------- day ", (.day | tostring), " --------"] | add),
+        ("name, sellIn, quality"),
+        (.items[] | [.name, .sell_in, .quality | tostring] | join(", "))
+    )
+)