Start work on main tests

Cargo.lock

@@ -280,17 +280,11 @@ dependencies = [
 name = "this_algorithm"
 version = "0.1.0"
 dependencies = [
- "s2",
- "thiserror",
- "words",
-]
-
-[[package]]
-name = "this_algoritm"
-version = "0.1.0"
-dependencies = [
+ "csv",
  "s2",
  "serde",
+ "thiserror",
+ "words",
 ]
 
 [[package]]

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "this_algoritm"
+name = "this_algorithm"
 version = "0.1.0"
 edition = "2021"
 
@@ -16,3 +16,7 @@ members = [
 s2 = "0.0.12"
 thiserror = "1.0.38"
 words = {path="./words"}
+
+[dev-dependencies]
+csv = "1.1"
+serde={version="1", features=["derive"]}

src/lib.rs

@@ -19,7 +19,12 @@ use words::Word;
 pub type Number = u32;
 pub type Version = u8;
 
+/// The S2 cellid level for the entire algorithm
+pub const CELLID_LEVEL: u8 = 23;
+
+/// The maximum number value for V0
 pub const V0_MAX_NUMBER: u32 = 1024;
+/// The minimum number value for V0
 pub const V0_MIN_NUMBER: u32 = 1;
 
 #[derive(Error, Debug, Eq, PartialEq)]
@@ -108,6 +113,16 @@ impl Address<'_> {
         v0::UnpackedCellID::from(cellid).into()
     }
 
+    /// Constructs an address from the given cellid
+    pub fn from_cellid(cellid: CellID) -> Self {
+        v0::UnpackedCellID::from(cellid).into()
+    }
+
+    /// Constructs an address from a u64 representation of a cellid
+    pub fn from_cellid_u64(cellid_u64: u64) -> Self {
+        v0::UnpackedCellID::from(CellID(cellid_u64)).into()
+    }
+
     // /// Decodes an address to latitude and longitude
     // pub fn to_lat_lon(&self) -> (f64, f64) {
     //     let cellid = self.as_cell_id();
@@ -144,7 +159,7 @@ impl Address<'_> {
         }
     }
 
-    fn as_cell_id(&self) -> Result<CellID, Error> {
+    pub fn as_cell_id(&self) -> Result<CellID, Error> {
         match extract_version(self.number) {
             0 => {
                 let ten_bits = 0b1111_1111_11;
@@ -154,6 +169,10 @@ impl Address<'_> {
                     ret = (ret << 13) | (w.number as u64 & thirteen_bits);
                 }
                 ret = (ret << 15) | (0x1 << 14);
+                // Add the 1 bit at position 14
+                ret = ret | (0b1 << 14);
+
+                dbg!(ret);
 
                 Ok(CellID(ret))
             }

src/v0.rs

@@ -30,6 +30,11 @@ impl From<u64> for UnpackedCellID {
 
 impl From<UnpackedCellID> for Address<'_> {
     fn from(unpacked_cell_id: UnpackedCellID) -> Self {
+        eprintln!(
+            "Got number: for word 0: {} (of {})",
+            unpacked_cell_id.word0_bits as usize,
+            words::NUMBER_TO_WORDS.len()
+        );
         let word0 = words::NUMBER_TO_WORDS[unpacked_cell_id.word0_bits as usize][0];
         let word1 = words::NUMBER_TO_WORDS[unpacked_cell_id.word1_bits as usize][0];
         let word2 = words::NUMBER_TO_WORDS[unpacked_cell_id.word2_bits as usize][0];

test-data/01-sample-latlon-s2cpp-cellid.csv

@@ -1,4 +1,4 @@
-lat,lon,cellid
+lat,lon,cell_id
 -0.0,-0.0,1152921504606846977
 -0.0,-1.0,1152737474027101739
 -0.0,-90.0,10376293541461622785

test-data/generator/generate.cpp

@@ -34,7 +34,7 @@ int main(int argc, char **argv) {
     string header;
     getline(file, header, '\n');
 
-    cout << header << ",cellid" << "\n";
+    cout << header << ",cell_id" << "\n";
 
     while (getline(file, latString, ',')) {
         getline(file, lonString, '\n') ;

tests/algorithm.rs

@@ -0,0 +1,49 @@
+use csv::ReaderBuilder;
+use s2::cellid::CellID;
+use serde::{Deserialize, Deserializer, Serialize};
+use std::{fs::File, str::FromStr};
+use this_algorithm::{Address, CELLID_LEVEL};
+#[macro_use]
+mod common;
+// use common::assert_eq_u64;
+
+// const CELLID_LEVEL_23_BITMASK: u64 =
+//     0b11111111_11111111_11111111_11111111_11111111_11111111_10000000_00000000;
+#[test]
+fn test_cellid_translation() {
+    let entries: Vec<TestEntry> = ReaderBuilder::new()
+        .from_reader(File::open("./test-data/01-sample-latlon-s2cpp-cellid.csv").unwrap())
+        .deserialize()
+        .collect::<Result<Vec<_>, _>>()
+        .unwrap();
+
+    for entry in &entries {
+        let addr = Address::from_lat_lon(entry.lat, entry.lon);
+        let addr_cellid = addr.as_cell_id().unwrap();
+
+        // Make sure the address is at the right level
+        assert_eq_u64!(addr_cellid.level(), CELLID_LEVEL as u64);
+
+        // Next, check if creating an address from a cellid matches itself
+        assert_eq!(addr, Address::from_cellid_u64(entry.cell_id));
+
+        // Now check if the actual cell id matches
+        assert_eq_u64!(
+            addr_cellid.0,
+            CellID(entry.cell_id).parent(CELLID_LEVEL as u64).0
+        );
+    }
+}
+
+#[test]
+fn test_encoding() {}
+
+#[test]
+fn test_decoding() {}
+
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+pub struct TestEntry {
+    lat: f64,
+    lon: f64,
+    cell_id: u64,
+}

tests/common/mod.rs

@@ -1 +1,22 @@
+#[macro_export]
+macro_rules! assert_eq_u64 {
+    ($a:expr, $b:expr) => {{
+        let are_equal = $a == $b;
+        let diff = $a ^ $b;
+        eprintln!("Comparing u64:");
+        let a_txt = format!("{:0>64b}", $a).replace('0', " ");
+        let b_txt = format!("{:0>64b}", $b).replace('0', " ");
+        let diff_txt = if diff == 0 {
+            String::from("NONE")
+        } else {
+            format!("{:0>64b}", diff)
+                .replace('0', " ")
+                .replace('1', "~")
+        };
+        eprintln!("\t{a_txt}.");
+        eprintln!("\t{b_txt}.");
+        eprintln!("Diff:\t{diff_txt}.");
 
+        // assert!(are_equal);
+    }};
+}