synced tests, and updated reference solution

exercises/practice/resistor-color-trio/.meta/src/reference/kotlin/ResistorColorTrio.kt

@@ -1,17 +1,19 @@
-import kotlin.math.log10
 import kotlin.math.pow
 
 object ResistorColorTrio {
 
     fun text(vararg input: Color): String {
-        val duoValue = 10 * input[0].ordinal + input[1].ordinal
-        val trioValue = duoValue * 10.0.pow(input[2].ordinal)
+        val (first, second, third) = input.take(3).map { it.ordinal.toLong() }
 
-        val thousandPowers = (log10(trioValue) / 3).toInt()
-        val resultValue = (trioValue / 1000.0.pow(thousandPowers)).toInt()
-        val resultUnit = Unit.values()[thousandPowers].name.lowercase()
+        val value: Long = ((first * 10L) + second) * 10L.pow(third.toInt())
 
-        return "$resultValue $resultUnit"
+        return when {
+            value >= 1e9  -> "${value / 1_000_000_000L} gigaohms"
+            value >= 1e6  -> "${value / 1_000_000L} megaohms"
+            value >= 1e3  -> "${value / 1_000L} kiloohms"
+            else          -> "$value ohms"
+        }
     }
-
 }
+
+fun Long.pow(exp: Int): Long = this.toDouble().pow(exp).toLong()

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

@@ -1,16 +1,40 @@
-[canonical-tests]
+# 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.
 
-# Orange and orange and black
-"d6863355-15b7-40bb-abe0-bfb1a25512ed" = true
+[d6863355-15b7-40bb-abe0-bfb1a25512ed]
+description = "Orange and orange and black"
 
-# Blue and grey and brown
-"1224a3a9-8c8e-4032-843a-5224e04647d6" = true
+[1224a3a9-8c8e-4032-843a-5224e04647d6]
+description = "Blue and grey and brown"
 
-# Red and black and red
-"b8bda7dc-6b95-4539-abb2-2ad51d66a207" = true
+[b8bda7dc-6b95-4539-abb2-2ad51d66a207]
+description = "Red and black and red"
 
-# Green and brown and orange
-"5b1e74bc-d838-4eda-bbb3-eaba988e733b" = true
+[5b1e74bc-d838-4eda-bbb3-eaba988e733b]
+description = "Green and brown and orange"
 
-# Yellow and violet and yellow
-"f5d37ef9-1919-4719-a90d-a33c5a6934c9" = true
+[f5d37ef9-1919-4719-a90d-a33c5a6934c9]
+description = "Yellow and violet and yellow"
+
+[5f6404a7-5bb3-4283-877d-3d39bcc33854]
+description = "Blue and violet and blue"
+
+[7d3a6ab8-e40e-46c3-98b1-91639fff2344]
+description = "Minimum possible value"
+
+[ca0aa0ac-3825-42de-9f07-dac68cc580fd]
+description = "Maximum possible value"
+
+[0061a76c-903a-4714-8ce2-f26ce23b0e09]
+description = "First two colors make an invalid octal number"
+
+[30872c92-f567-4b69-a105-8455611c10c4]
+description = "Ignore extra colors"

exercises/practice/resistor-color-trio/src/test/kotlin/ResistorColorTrioTest.kt

@@ -27,4 +27,24 @@ class ResistorColorTrioTest {
     @Ignore
     @Test
     fun `yellow violet violet`() = assertEquals("470 megaohms", ResistorColorTrio.text(YELLOW, VIOLET, VIOLET))
+
+    @Ignore
+    @Test
+    fun `blue and violet and blue`() = assertEquals("67 megaohms", ResistorColorTrio.text(BLUE, VIOLET, BLUE))
+
+    @Ignore
+    @Test
+    fun `minimum possible value`() = assertEquals("0 ohms", ResistorColorTrio.text(BLACK, BLACK, BLACK))
+
+    @Ignore
+    @Test
+    fun `maximum possible value`() = assertEquals("99 gigaohms", ResistorColorTrio.text(WHITE, WHITE, WHITE))
+
+    @Ignore
+    @Test
+    fun `first two colors make an invalid octal number`() = assertEquals("8 ohms", ResistorColorTrio.text(BLACK, GREY, BLACK))
+
+    @Ignore
+    @Test
+    fun `ignore extra colors`() = assertEquals("650 kiloohms", ResistorColorTrio.text(BLUE, GREEN, YELLOW, ORANGE))
 }