Sync largest-series-product docs with problem-specifications (exercism#2297)

kytrinyx · web-flow · commit a5a741d09dd6 · 2023-05-16T10:35:22.000+02:00
* Sync largest-series-product docs with problem-specifications The largest-series-product exercise has been overhauled as part of a project to make practice exercises more consistent and friendly. For more context, please see the discussion in the forum, as well as the pull request that updated the exercise in the problem-specifications repository: - https://forum.exercism.org/t/new-project-making-practice-exercises-more-consistent-and-human-across-exercism/3943 - exercism/problem-specifications#2246 * Delete test cases from largest-series-product This deletes two deprecated test cases so that we can dramatically simplify the instructions for this exercise.
diff --git a/exercises/practice/largest-series-product/.docs/instructions.md b/exercises/practice/largest-series-product/.docs/instructions.md
@@ -1,14 +1,26 @@
 # Instructions
 
-Given a string of digits, calculate the largest product for a contiguous
-substring of digits of length n.
+Your task is to look for patterns in the long sequence of digits in the encrypted signal.
 
-For example, for the input `'1027839564'`, the largest product for a
-series of 3 digits is 270 (9 * 5 * 6), and the largest product for a
-series of 5 digits is 7560 (7 * 8 * 3 * 9 * 5).
+The technique you're going to use here is called the largest series product.
 
-Note that these series are only required to occupy *adjacent positions*
-in the input; the digits need not be *numerically consecutive*.
+Let's define a few terms, first.
 
-For the input `'73167176531330624919225119674426574742355349194934'`,
-the largest product for a series of 6 digits is 23520.
+- **input**: the sequence of digits that you need to analyze
+- **series**: a sequence of adjacent digits (those that are next to each other) that is contained within the input
+- **span**: how many digits long each series is
+- **product**: what you get when you multiply numbers together
+
+Let's work through an example, with the input `"63915"`.
+
+- To form a series, take adjacent digits in the original input.
+- If you are working with a span of `3`, there will be three possible series:
+  - `"639"`
+  - `"391"`
+  - `"915"`
+- Then we need to calculate the product of each series:
+  - The product of the series `"639"` is 162 (`6 × 3 × 9 = 162`)
+  - The product of the series `"391"` is 27 (`3 × 9 × 1 = 27`)
+  - The product of the series `"915"` is 45 (`9 × 1 × 5 = 45`)
+- 162 is bigger than both 27 and 45, so the largest series product of `"63915"` is from the series `"639"`.
+  So the answer is **162**.
diff --git a/exercises/practice/largest-series-product/.docs/introduction.md b/exercises/practice/largest-series-product/.docs/introduction.md
@@ -0,0 +1,5 @@
+# Introduction
+
+You work for a government agency that has intercepted a series of encrypted communication signals from a group of bank robbers.
+The signals contain a long sequence of digits.
+Your team needs to use various digital signal processing techniques to analyze the signals and identify any patterns that may indicate the planning of a heist.
diff --git a/exercises/practice/largest-series-product/.meta/tests.toml b/exercises/practice/largest-series-product/.meta/tests.toml
@@ -34,9 +34,11 @@ description = "rejects span longer than string length"
 
 [06bc8b90-0c51-4c54-ac22-3ec3893a079e]
 description = "reports 1 for empty string and empty product (0 span)"
+include = false
 
 [3ec0d92e-f2e2-4090-a380-70afee02f4c0]
 description = "reports 1 for nonempty string and empty product (0 span)"
+include = false
 
 [6d96c691-4374-4404-80ee-2ea8f3613dd4]
 description = "rejects empty string and nonzero span"
diff --git a/exercises/practice/largest-series-product/src/test/java/LargestSeriesProductCalculatorTest.java b/exercises/practice/largest-series-product/src/test/java/LargestSeriesProductCalculatorTest.java
@@ -116,28 +116,6 @@ public void testSeriesLengthLongerThanLengthOfStringToTestIsRejected() {
                 .withMessage("Series length must be less than or equal to the length of the string to search.");
     }
 
-    @Ignore("Remove to run test")
-    @Test
-    public void testCorrectlyCalculatesLargestProductOfLength0ForEmptyStringToSearch() {
-        LargestSeriesProductCalculator calculator = new LargestSeriesProductCalculator("");
-        long expectedProduct = 1;
-
-        long actualProduct = calculator.calculateLargestProductForSeriesLength(0);
-
-        assertEquals(expectedProduct, actualProduct);
-    }
-
-    @Ignore("Remove to run test")
-    @Test
-    public void testCorrectlyCalculatesLargestProductOfLength0ForNonEmptyStringToSearch() {
-        LargestSeriesProductCalculator calculator = new LargestSeriesProductCalculator("123");
-        long expectedProduct = 1;
-
-        long actualProduct = calculator.calculateLargestProductForSeriesLength(0);
-
-        assertEquals(expectedProduct, actualProduct);
-    }
-
     @Ignore("Remove to run test")
     @Test
     public void testEmptyStringToSearchAndSeriesOfNonZeroLengthIsRejected() {
