Added resistor_color_trio_test

config.json

@@ -682,6 +682,20 @@
         ],
         "difficulty": 2
       },
+      {
+        "slug": "resistor-color-trio",
+        "name": "Resistor Color Trio",
+        "uuid": "089f06a6-0759-479c-8c00-d699525a1e22",
+        "practices": ["list-methods"],
+        "prerequisites": [
+          "basics",
+          "bools",
+          "lists",
+          "list-methods",
+          "numbers"
+        ],
+        "difficulty": 2
+      },
       {
         "slug": "twelve-days",
         "name": "Twelve Days",

exercises/practice/resistor-color-trio/.docs/instructions.md

@@ -0,0 +1,54 @@
+# Instructions
+
+If you want to build something using a Raspberry Pi, you'll probably use _resistors_.
+For this exercise, you need to know only three things about them:
+
+- Each resistor has a resistance value.
+- Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.
+  To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values.
+- Each band acts as a digit of a number.
+  For example, if they printed a brown band (value 1) followed by a green band (value 5), it would translate to the number 15.
+  In this exercise, you are going to create a helpful program so that you don't have to remember the values of the bands.
+  The program will take 3 colors as input, and outputs the correct value, in ohms.
+  The color bands are encoded as follows:
+
+- Black: 0
+- Brown: 1
+- Red: 2
+- Orange: 3
+- Yellow: 4
+- Green: 5
+- Blue: 6
+- Violet: 7
+- Grey: 8
+- White: 9
+
+In `resistor-color duo` you decoded the first two colors.
+For instance: orange-orange got the main value `33`.
+The third color stands for how many zeros need to be added to the main value.
+The main value plus the zeros gives us a value in ohms.
+For the exercise it doesn't matter what ohms really are.
+For example:
+
+- orange-orange-black would be 33 and no zeros, which becomes 33 ohms.
+- orange-orange-red would be 33 and 2 zeros, which becomes 3300 ohms.
+- orange-orange-orange would be 33 and 3 zeros, which becomes 33000 ohms.
+
+(If Math is your thing, you may want to think of the zeros as exponents of 10.
+If Math is not your thing, go with the zeros.
+It really is the same thing, just in plain English instead of Math lingo.)
+
+This exercise is about translating the colors into a label:
+
+> "... ohms"
+
+So an input of `"orange", "orange", "black"` should return:
+
+> "33 ohms"
+
+When we get more than a thousand ohms, we say "kiloohms".
+That's similar to saying "kilometer" for 1000 meters, and "kilograms" for 1000 grams.
+
+So an input of `"orange", "orange", "orange"` should return:
+
+> "33 kiloohms"

exercises/practice/resistor-color-trio/.meta/config.json

@@ -0,0 +1,22 @@
+{
+  "blurb": "Convert color codes, as used on resistors, to a human-readable label.",
+  "authors": [
+    "meabtall133",
+    "bethanyg"
+  ],
+  "contributors": [
+  ],
+  "files": {
+    "solution": [
+      "resistor_color_trio.py"
+    ],
+    "test": [
+      "resistor_color_trio_test.py"
+    ],
+    "example": [
+      ".meta/example.py"
+    ]
+  },
+  "source": "Maud de Vries, Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/issues/1549"
+}

exercises/practice/resistor-color-trio/.meta/example.py

@@ -0,0 +1,18 @@
+COLORS = [
+    'black',
+    'brown',
+    'red',
+    'orange',
+    'yellow',
+    'green',
+    'blue',
+    'violet',
+    'grey',
+    'white'
+]
+
+
+def label(colors):
+    value = 10 * COLORS.index(colors[0]) + COLORS.index(colors[1])
+    value *= 10 ** COLORS.index(colors[2])
+    return str(value) + ' ohms' if value < 1000 else str(value // 1000) + ' kiloohms'

exercises/practice/resistor-color-trio/.meta/template.j2

@@ -0,0 +1,15 @@
+{%- import "generator_macros.j2" as macros with context -%}
+{% macro test_case(case) -%}
+    {%- set input = case["input"] -%}
+    def test_{{ case["description"] | to_snake }}(self):
+        self.assertEqual(
+            {{ case["property"] | to_snake }}({{ case["input"]["colors"] }}),
+            "{{ case['expected']['value']}} {{ case['expected']['unit']}}"
+        )
+{%- endmacro %}
+{{ macros.header()}}
+
+class {{ exercise | camel_case }}Test(unittest.TestCase):
+    {% for case in cases -%}
+        {{ test_case(case) }}
+    {% endfor %}

exercises/practice/resistor-color-trio/.meta/tests.toml

@@ -0,0 +1,25 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[d6863355-15b7-40bb-abe0-bfb1a25512ed]
+description = "Orange and orange and black"
+
+[1224a3a9-8c8e-4032-843a-5224e04647d6]
+description = "Blue and grey and brown"
+
+[b8bda7dc-6b95-4539-abb2-2ad51d66a207]
+description = "Red and black and red"
+
+[5b1e74bc-d838-4eda-bbb3-eaba988e733b]
+description = "Green and brown and orange"
+
+[f5d37ef9-1919-4719-a90d-a33c5a6934c9]
+description = "Yellow and violet and yellow"

exercises/practice/resistor-color-trio/resistor_color_trio.py

@@ -0,0 +1,2 @@
+def label(colors):
+    pass

exercises/practice/resistor-color-trio/resistor_color_trio_test.py

@@ -0,0 +1,24 @@
+import unittest
+
+from resistor_color_trio import (
+    label,
+)
+
+# Tests adapted from `problem-specifications//canonical-data.json`
+
+
+class ResistorColorTrioTest(unittest.TestCase):
+    def test_orange_and_orange_and_black(self):
+        self.assertEqual(label(["orange", "orange", "black"]), "33 ohms")
+
+    def test_blue_and_grey_and_brown(self):
+        self.assertEqual(label(["blue", "grey", "brown"]), "680 ohms")
+
+    def test_red_and_black_and_red(self):
+        self.assertEqual(label(["red", "black", "red"]), "2 kiloohms")
+
+    def test_green_and_brown_and_orange(self):
+        self.assertEqual(label(["green", "brown", "orange"]), "51 kiloohms")
+
+    def test_yellow_and_violet_and_yellow(self):
+        self.assertEqual(label(["yellow", "violet", "yellow"]), "470 kiloohms")